A two-stage oil-free
Screw Vacuum Pump is a power equipment consisting of a front stage pump and a rear stage pump connected in series. It adopts an asymmetric screw rotor with opposite motion design, and achieves gas transportation and pumping by periodically changing the inter tooth volume. Its core features include oil-free lubrication (avoiding oil pollution, suitable for high cleanliness industries such as pharmaceuticals and food), two-stage compression technology (quickly achieving high vacuum degree, with the ultimate vacuum degree exceeding 0.1Pa), and gradient compression capability (segmented cooling of high-temperature gases to reduce material thermal damage). This device has the advantages of high efficiency and energy saving (measured energy-saving rate can reach 50%), stable operation (low vibration, low noise), and corrosion resistance (stainless steel material can deal with corrosive gases). It is widely used in medical laboratories (vacuum filtration, centrifugal concentration), industrial manufacturing (electronic component packaging, vacuum packaging), and environmental protection treatment (waste gas recovery), especially suitable for scenarios with strict requirements for vacuum cleanliness and stability.
The 15kW oil-free two-stage screw
Vacuum Pump is a dry vacuum device utilizing advanced twin-screw technology. It achieves a pure, oil-free, media-free vacuuming process within the pump chamber, making it an ideal choice for meeting demanding industrial requirements.
Its core value lies in not only providing a clean vacuum environment, preventing oil contamination of products, but also offering exceptional energy-saving, environmentally friendly features and low maintenance costs, perfectly meeting the modern manufacturing industry's demand for high-quality, efficient, and environmentally friendly production.
For overseas customers seeking production cleanliness, cost control, and environmental compliance, the 15kW oil-free two-stage screw vacuum pump is a modern alternative to traditional oil-sealed vacuum pumps (such as rotary vane pumps) or liquid ring pumps.
The two-stage oil-free screw vacuum pump, with its unique design and technological innovation, has demonstrated significant advantages in industrial applications
Environmental Protection and Cleanliness: The oil-free design completely eliminates oil vapor pollution, meeting the needs of high cleanliness industries such as electronics, medical, and food, and avoiding the risk of process pollution.
Efficient and energy-saving: The dual stage compression structure combined with permanent magnet frequency conversion technology improves the pumping efficiency by more than 50%, reduces energy consumption by 20-30% compared to traditional pumps, and has outstanding long-term economic performance.
Corrosion resistance and durability: Made of special materials such as stainless steel, it can handle corrosive gases (such as NMP solvent in lithium battery manufacturing), extend equipment life, and reduce maintenance costs.
Wide pressure adaptability: Supports stable pumping over a wide range from atmospheric pressure to 10Pa, achieving high vacuum requirements without the need for a pre pump.
Low maintenance and high reliability: The non-contact screw design reduces wear and tear, with an average of over 20000 hours of trouble free operation. Only the intake filter needs to be replaced on a daily basis.
Comparative advantage: Compared to Roots pumps, the ultimate vacuum degree is higher (up to 0.1Pa); Compared to vortex pumps, it has stronger adaptability to complex gases (including dust and condensable steam) and lower maintenance costs.
Its applications cover fields such as medical vacuum filtration, semiconductor manufacturing, and environmental waste gas treatment, making it an advanced vacuum solution that balances performance, environmental protection, and economic benefits.
Double stage oil-free screw vacuum pumps are widely used in various industrial fields that require strict vacuum environments due to their clean, oil-free, efficient, stable, and adaptable characteristics. In the semiconductor industry, it is used for chip mounting and encapsulation, providing a high cleanliness vacuum environment to ensure yield; In the field of new energy vehicles, its oil-free characteristics ensure that the packaging process of electronic components is pollution-free; The food processing industry relies on its high-speed vacuum sealing capability to avoid oil pollution and improve production efficiency. In addition, the equipment also serves solvent recovery and drug purification in the chemical and pharmaceutical industries, as well as vacuum systems in the nuclear industry. It covers scenarios such as scientific research experiments and LCD display manufacturing, meeting the needs of high vacuum degree, low energy consumption, and environmental protection.
Who should prioritize this model?
If your needs meet the following criteria, this 15KW oil-free two-stage screw vacuum pump is the optimal solution:
1. Requires a clean vacuum environment (e.g., pharmaceuticals, food, electronics), and must avoid oil or working fluid contamination;
2. Requires high vacuum (≥-0.09MPa) and stable pumping speed, suitable for continuous production or complex media conditions;
3. Long annual operating time (≥3000 hours), with a focus on energy saving, consumption reduction, and maintenance cost control;
Flexible application scenarios (e.g., multi-equipment linkage, small and medium-sized production lines), requiring precise matching of 15KW power.
It not only meets the vacuum requirements of demanding processes but also helps companies reduce overall operating costs through its oil-free, environmentally friendly, energy-saving, and durable characteristics. It aligns with the development trend of modern green industrial production and is the preferred upgrade to replace traditional oil-lubricated pumps and water ring pumps.
Q1. What is an oil-free vacuum pump and how does it work? +
It is a vacuum pump that operates without any oil in the compression chamber — using dry rotary vanes, pistons or diaphragm mechanisms with self-lubricating materials. There is no oil to change, no oil mist in the exhaust and no risk of oil contamination of your process or product, making it the clean, low-maintenance choice for sensitive applications.
Q2. Which applications is it used for? +
Typical duties include medical equipment (suction, dental chairs, analyzers), laboratories and analyzers, food vacuum packaging, electronics and PCB manufacturing, printing and paper handling, vacuum pick-and-place, packaging lines, environmental monitoring, and cleanroom-adjacent processes where oil contamination is unacceptable.
Q3. What ultimate vacuum can it achieve? +
Dry vane designs typically reach about 5–10 mbar, piston types 30–100 mbar and diaphragm pumps similar ranges, depending on the model. This covers most packaging, pick-and-place and suction applications. If your process requires deeper vacuum (below a few mbar), we can recommend an oil-sealed or dry screw solution. Two-stage dry screw pumps typically reach an ultimate pressure of about 0.1–0.5 mbar (10–50 Pa), covering most industrial processes. Combined with a roots booster, levels below 0.01 mbar can be achieved where required.
Q4. What pumping speed ranges do you offer? +
Our oil-free units cover pumping speeds from about 1 to 120 m³/h, from compact medical-grade pumps to larger industrial packaging units. Provide your chamber volume, required vacuum level and cycle time, and we will size the optimum model.
Q5. Why choose oil-free instead of an oil-sealed pump? +
Oil-free pumps eliminate oil changes, oil disposal, exhaust oil mist and the risk of oil back-streaming into your process. They are safer for medical, food and cleanroom use, run cleaner and cost less to maintain — at the price of a slightly higher initial cost and somewhat higher ultimate vacuum limit.
Q6. What maintenance does it require? +
Very little. There is no oil to change; routine work is limited to cleaning or replacing the intake filter, checking valves and hoses, and periodic inspection of the drive and vanes/diaphragm. A simple annual service keeps the pump running reliably for years.
Q7. Is the exhaust clean? +
Yes. With no oil in the system, the exhaust contains no oil mist and minimal contaminants. Optional exhaust filters and silencers further reduce particles and noise, making it suitable for laboratories and clean production areas.
Q8. How noisy is it? +
Our oil-free pumps are designed for quiet operation — typically 50–68 dB(A) depending on model — with balanced mechanics and optional acoustic enclosures for noise-sensitive sites such as clinics and labs.
Q9. Can it run continuously? +
Yes. The pumps are rated for continuous duty at their specified performance, with adequate cooling and thermal protection. For demanding 24/7 packaging lines we recommend models with duty-rated motors and monitoring options.
The purchase price is slightly higher than an equivalent oil pump, but total cost of ownership is often lower: no oil purchases or changes, no filter oil disposal, less maintenance labor and no contamination-related product loss. We can provide a lifetime cost comparison for your specific duty.
Q11. What are the installation requirements? +
Place the pump on a level surface with ventilation, connect the suction line (short, large-diameter for best performance) and provide the correct motor supply. Many models are compact and can be mounted directly on machinery or in a cabinet. Accessories include inlet filters, vacuum gauges and regulators.
Q12. Can it handle humidity or particulates? +
Dry pumps handle light moisture well; for humid or dusty processes we recommend an inlet filter and, where needed, a separator upstream to protect the pumping chamber. Confirm your media with us and we will configure the right protection package.
Q13. Do you offer medical-grade or certified versions? +
Yes. We supply versions with appropriate materials and performance for medical and food-contact duties, and we can provide certification documentation required for your market. Confirm your application and applicable standards, and we will match the right configuration.
Q14. Do you support customization and OEM/ODM? +
Yes. As the manufacturer, we customize voltage/frequency (e.g. 110V/220V/380V, 50/60Hz), motor options, accessories and packages, color and branding, plus OEM/ODM with your logo and documentation.
Q15. What certifications do you hold and what is the lead time? +
Our factory is ISO 9001 certified and pumps carry CE certification, with other certificates available for your market. Standard models ship within 7–20 days after order confirmation, customized units 20–40 days, export-packed for sea or air freight.
Q16. What warranty and after-sales support do you provide? +
We offer a 12–24 month warranty, 24/7 remote technical support, installation guidance and operator training, and long-term spare parts supply — filters, valves, vanes and service kits — typically dispatched within 3–7 days to keep your line running.
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